.button{
	height: 50px;
	width: 50px;
	background-color: transparent;
	background-image: url(../images/nav_back.png);
	background-size: 12px 22px;
	background-position: 14px 15px; 
	background-repeat: no-repeat;
	align-content: center; 
	border: none;
}
#top{
	margin-left: -6%;
}
nav{
	margin-top: 54px;
	height: 50px;
	background-color: rgb(248,248,248);
	font-weight: lighter;
}
nav>span{
	display: inline-block;
	font-size: 18px;
	width: 23%;
	text-align: center;
	line-height: 50px;
	color: gray;
}
nav>span:first-child{
	margin-left: 6px;
}
nav .price{
	padding-right: 15px;
	background-image: url(../images/li_no.png);
	background-repeat: no-repeat;
	background-position: 75% 50%;
	background-size: 15% 40%;
}
nav .price1{
	padding-right: 15px;
	background-image: url(../images/上尖号.png);
	background-repeat: no-repeat;
	background-position: 75% 45%;
	background-size: 14% 25%;
}
nav .price2{
	padding-right: 15px;
	background-image: url(../images/下尖号.png);
	background-repeat: no-repeat;
	background-position: 75% 60%;
	background-size: 12% 16%;
}
.price4{
	font-weight: bold;
	color: black;
}
section{
	width: 100%;
	text-align: center;
	margin-top: 10px;
}
section a{
	width: 47%;
	display: inline-block;
}
section img{
	width: 100%;
}
section a div{
	margin-top: 5px;
}
section a span{
	display: inline-block;
	margin-top: 5px;
	font-size: 15px;
	font-weight: bold;
}

.bottom{
	margin: auto;
	color: rgb(153,153,153);
	margin: 20px 0px;
	margin-top: 30px;
}
.synthesize{
	/*display: none;*/
}